Quote: Originally Posted by
blueglitch 
I took apart the G4 and unplugged everything hooked up so that just the amp board
I assume you aren't talking about an external amp? If you are talking about an external amp, disconnect that and then try to power your unit.
Are you sure you haven't pinched a wire during tear downs? Check that.
Have you tried powering up without your SSD? Maybe there is a defect there.
If all else fails, infill has gone out of business so there is little chance of getting the unit repaired. You might be able to buy another dead unit and take some parts from that one.
Keep us posted on your progress. Maybe there is some other advice the community can contribute.